Top 100 Contractors in PSC 4130: Refrigeration and Air Conditioning Components, FY2021

Name: Top 100 Contractors in PSC 4130: Refrigeration and Air Conditioning Components, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 73% of FY2021 PSC 4130 contract dollars

Contract obligations: $108,952,157 Net of deobligations, by contracts coded PSC 4130
Contractors: 401 Parent companies with an obligation
Largest contractor: DCM Clean Air Products, Inc. $45.4 million, 40.6% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	DCM Clean Air Products, Inc. Top agencies DLA (Defense Logistics Agency)	$45,448,496	40.6%	Rank history: #1 in FY2022, #1 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
2	Johnson Controls Security Solutions LLC 7 awardees, including Johnson Controls Navy Systems, LLC and Johnson Controls, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$11,709,826	10.5%	Rank history: #2 in FY2022, #3 in FY2023, #6 in FY2024 and not on the FY2025 list; unchanged since FY2020.
3	BBA Aviation PLC Through Ontic Engineering & Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$4,862,301	4.3%	Rank history: #39 in FY2022, #4 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
4	Leonardo S.p.A. 2 awardees, including Engineered Coil Company and Laurel Technologies Partnership Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$4,699,651	4.2%	Rank history: #5 in FY2022, #8 in FY2023, #4 in FY2024 and #5 in FY2025; unchanged since FY2020.
5	Consolidated Edison Through RWE Clean Energy Solutions, Inc. Top agencies DOT (Department of Transportation)	$4,199,028	3.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
6	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$2,287,401	2.0%	Rank history: #8 in FY2022, #7 in FY2023, #13 in FY2024 and #17 in FY2025; down 1 since FY2020.
7	Clayton Associates Inc. Top agencies DLA (Defense Logistics Agency)	$2,232,734	2.0%	Rank history: #16 in FY2022, #9 in FY2023, #7 in FY2024 and #9 in FY2025; up 3 since FY2020.
8	Hunter Defense Technolog Through HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$2,226,533	2.0%	Rank history: #4 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
9	Global Logistics & Services W.L.L. Top agencies USSOCOM (United States Special Operations Command)	$1,850,000	1.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
10	Trane U.S. Inc. 2 awardees Top agencies GSA (General Services Administration) Army (Department of the Army) USAF (Department of the Air Force)	$1,690,097	1.5%	Rank history: #17 in FY2022, #10 in FY2023, #10 in FY2024 and not on the FY2025 list; up 9 since FY2020.
11	Parker-Hannifin Corporation Top agencies DLA (Defense Logistics Agency)	$1,572,181	1.4%	Rank history: #9 in FY2022, #11 in FY2023, #11 in FY2024 and #16 in FY2025; up 7 since FY2020.
12	Honeywell International Inc. 3 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,029,724	0.9%	Rank history: #6 in FY2022, #5 in FY2023, #5 in FY2024 and not on the FY2025 list; down 5 since FY2020.
13	Quality Refrigeration Company, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$786,682	0.7%	Rank history: #25 in FY2022, #57 in FY2023, #16 in FY2024 and #12 in FY2025; up 39 since FY2020.
14	Ontic Engineering & Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$757,332	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
15	Government of the United States 2 awardees, including Federal Prison Industries, Inc. Top agencies Army (Department of the Army) JFK (John F. Kennedy Center for the Performing Arts)	$713,894	0.6%	Rank history: #49 in FY2022, #20 in FY2023, #15 in FY2024 and #24 in FY2025; up 2 since FY2020.
16	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$642,672	0.6%	Rank history: not on the FY2022–FY2024 lists and #61 in FY2025; up 94 since FY2020.
17	General Dynamics Corporation 4 awardees, including Electric Boat Corporation, General Dynamics Land Systems - Canada Corporation and General Dynamics Mission Systems, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$635,747	0.6%	Rank history: #3 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
18	Chesapeake Marine Refrigeration Corp Top agencies Navy (Department of the Navy)	$627,589	0.6%	Rank history: #24 in FY2022, #42 in FY2023, #8 in FY2024 and #14 in FY2025; up 5 since FY2020.
19	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$577,552	0.5%	Rank history: #18 in FY2022, #48 in FY2023, not on the FY2024 list and #44 in FY2025; down 5 since FY2020.
20	P.a.r. Products Co Top agencies DLA (Defense Logistics Agency)	$577,000	0.5%	Rank history: not on the FY2022 list, #85 in FY2023, not on the FY2024 list and #29 in FY2025; up 1 since FY2020.
21	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$470,660	0.4%	Rank history: #44 in FY2022, #53 in FY2023, #29 in FY2024 and #18 in FY2025; up 1 since FY2020.
22	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$426,119	0.4%	Rank history: #27 in FY2022, #27 in FY2023, #17 in FY2024 and #30 in FY2025; up 23 since FY2020.
23	Xchanger Manufacturing Corporation Top agencies DLA (Defense Logistics Agency)	$409,300	0.4%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
24	Complete Packaging and Shipping Supplies, Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$400,904	0.4%	Rank history: #7 in FY2022 and not on the FY2023–FY2025 lists; down 16 since FY2020.
25	Venergy Group LLC Top agencies VA (Department of Veterans Affairs)	$397,505	0.4%	Rank history: #28 in FY2022, #39 in FY2023, not on the FY2024 list and #90 in FY2025; new, not ranked in FY2020.
26	Cospolich Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$397,221	0.4%	Rank history: #35 in FY2022, #24 in FY2023, #26 in FY2024 and #13 in FY2025; up 8 since FY2020.
27	Northrop Grumman Corporation Through Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$386,037	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Johnson Controls, Inc. 2 awardees, including Johnson Controls Building Automation Systems, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$381,707	0.3%	Rank history: #14 in FY2022 and not on the FY2023–FY2025 lists; down 19 since FY2020.
29	Science Applications International Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$338,969	0.3%	Rank history: #36 in FY2022, #35 in FY2023, #74 in FY2024 and not on the FY2025 list; down 18 since FY2020.
30	Aldevra LLC Top agencies VA (Department of Veterans Affairs)	$335,196	0.3%	Rank history: not on the FY2022–FY2025 lists; up 161 since FY2020.
31	White RON & Associates LLC Top agencies DLA (Defense Logistics Agency)	$313,560	0.3%	Rank history: #86 in FY2022, #71 in FY2023, not on the FY2024 list and #55 in FY2025; down 3 since FY2020.
32	Pro-Line Procurement Services LLC Top agencies USAF (Department of the Air Force)	$299,495	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Makdad Industrial Supply Co., Inc. Top agencies DLA (Defense Logistics Agency)	$295,428	0.3%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
34	Fairbanks Morse, LLC 2 awardees Top agencies Navy (Department of the Navy)	$288,009	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	Multistack LLC Top agencies DOS (Department of State)	$283,762	0.3%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; up 54 since FY2020.
36	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$276,080	0.2%	Rank history: #26 in FY2022, #67 in FY2023, #18 in FY2024 and #4 in FY2025; up 55 since FY2020.
37	Interra Global Corp Top agencies USAF (Department of the Air Force)	$271,805	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Air Filter Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$262,204	0.2%	Rank history: #42 in FY2022, #62 in FY2023, #40 in FY2024 and #49 in FY2025; new, not ranked in FY2020.
39	Burhani Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$242,983	0.2%	Rank history: not on the FY2022–FY2023 lists, #80 in FY2024 and not on the FY2025 list; up 69 since FY2020.
40	Applied Cooling Technology, LLC Top agencies Navy (Department of the Navy)	$241,040	0.2%	Rank history: not on the FY2022–FY2023 lists, #28 in FY2024 and not on the FY2025 list; up 2 since FY2020.
41	Clark Air Conditioning Systems, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$238,264	0.2%	Rank history: #62 in FY2022, #54 in FY2023, #42 in FY2024 and #36 in FY2025; up 21 since FY2020.
42	CPS Building Services Limited Top agencies USAF (Department of the Air Force)	$237,982	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Engineered Coil Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$236,204	0.2%	Rank history: not on the FY2022–FY2025 lists; down 11 since FY2020.
44	Comfort & Process Solutions, LLC Top agencies DOJ (Department of Justice)	$221,435	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Johnson Controls Navy Systems, LLC Top agencies DLA (Defense Logistics Agency)	$201,803	0.2%	Rank history: not on the FY2022–FY2023 lists, #1 in FY2024 and #1 in FY2025; down 4 since FY2020.
46	US Supply Corporation Top agencies DLA (Defense Logistics Agency)	$195,565	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Stealth Supply, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$191,990	0.2%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; down 16 since FY2020.
48	Penn Detroit Diesel Allison LLC Through Penn Power Group LLC Top agencies DLA (Defense Logistics Agency)	$191,239	0.2%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 30 since FY2020.
49	Kpaul Properties LLC Top agencies DHS (Department of Homeland Security)	$189,901	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Terra Defense LLC Top agencies DLA (Defense Logistics Agency)	$189,100	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$184,857	0.2%	Rank history: #58 in FY2022, #59 in FY2023, #76 in FY2024 and #53 in FY2025; up 2 since FY2020.
52	Great Plains Communications LLC Through Strantech LLC Top agencies USAF (Department of the Air Force) OPM (Office of Personnel Management)	$176,487	0.2%	Rank history: not on the FY2022 list, #63 in FY2023 and not on the FY2024–FY2025 lists; up 80 since FY2020.
53	Megabite Electronics, Inc. Top agencies DLA (Defense Logistics Agency)	$171,399	0.2%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; up 64 since FY2020.
54	Tyonek Native Corporatio 2 awardees, including Tfab Defense Systems LLC Top agencies Army (Department of the Army)	$169,620	0.2%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
55	Mydax, Inc. Top agencies USAF (Department of the Air Force)	$169,350	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$165,336	0.1%	Rank history: #78 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; down 16 since FY2020.
57	Airfixture LLC Top agencies DOS (Department of State)	$164,550	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$163,555	0.1%	Rank history: #80 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
59	Accentz, Inc. Top agencies USAF (Department of the Air Force)	$158,066	0.1%	Rank history: #22 in FY2022, #33 in FY2023, not on the FY2024 list and #68 in FY2025; new, not ranked in FY2020.
60	Marvin Engineering Co, Inc. Through Marvin Land Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$157,925	0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
61	Flagship Marine, Inc. Top agencies Navy (Department of the Navy)	$155,330	0.1%	Rank history: #15 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
62	Middle Georgia Diversified Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$151,123	0.1%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
63	Ashtead US Holdings Inc Through Sunbelt Rentals, Inc. Top agencies VA (Department of Veterans Affairs)	$150,595	0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
64	Am General LLC Top agencies DLA (Defense Logistics Agency)	$150,007	0.1%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
65	VSE Corporation Through Wheeler Fleet Solutions, Co. Top agencies DLA (Defense Logistics Agency)	$147,044	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
66	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$145,340	0.1%	Rank history: not on the FY2022–FY2025 lists; down 18 since FY2020.
67	Warfighter Focused Logistics Inc. Top agencies DLA (Defense Logistics Agency)	$139,182	0.1%	Rank history: #19 in FY2022, #16 in FY2023, #23 in FY2024 and #15 in FY2025; down 9 since FY2020.
68	General Aire Systems, Inc. Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury)	$136,367	0.1%	Rank history: #20 in FY2022, #84 in FY2023, #37 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
69	RNK International, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$135,556	0.1%	Rank history: not on the FY2022 list, #95 in FY2023, #58 in FY2024 and #75 in FY2025; up 1 since FY2020.
70	Daikin Applied Americas Inc Through Flanders Filters, Inc. Top agencies Navy (Department of the Navy)	$135,414	0.1%	Rank history: #68 in FY2022, #73 in FY2023, #98 in FY2024 and not on the FY2025 list; up 139 since FY2020.
71	Adrick Marine Group, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$127,912	0.1%	Rank history: not on the FY2022–FY2023 lists, #30 in FY2024 and #54 in FY2025; down 44 since FY2020.
72	Oshkosh Corp 2 awardees, including Oshkosh Defense LLC and JLG Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$126,309	0.1%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
73	TRI-DIM Filter Corporation Top agencies DLA (Defense Logistics Agency)	$121,810	0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
74	Noresco LLC Through Carrier Corporation Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$120,526	0.1%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
75	B & H International LLC Top agencies Navy (Department of the Navy) DOS (Department of State)	$119,099	0.1%	Rank history: not on the FY2022–FY2025 lists; up 79 since FY2020.
76	Kyodo Shipping & Trading Corp USA Top agencies DLA (Defense Logistics Agency)	$116,615	0.1%	Rank history: #69 in FY2022, not on the FY2023–FY2024 lists and #92 in FY2025; down 10 since FY2020.
77	Texas Mechanical & Facilities, LLC Top agencies VA (Department of Veterans Affairs)	$114,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Rapid Heating Air Conditioning & Plumbing Services Top agencies DOL (Department of Labor)	$111,900	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	J & J Maintenance Inc. Top agencies USAF (Department of the Air Force)	$110,164	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$107,717	0.1%	Rank history: #37 in FY2022, #46 in FY2023, #84 in FY2024 and #60 in FY2025; down 51 since FY2020.
81	Libby Power Systems, LLC Top agencies DLA (Defense Logistics Agency)	$106,962	0.1%	Rank history: #92 in FY2022, not on the FY2023 list, #90 in FY2024 and not on the FY2025 list; up 22 since FY2020.
82	R.j. Murray Co., Inc. Top agencies DLA (Defense Logistics Agency)	$105,567	0.1%	Rank history: #93 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
83	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$105,340	0.1%	Rank history: #88 in FY2022, #65 in FY2023, #38 in FY2024 and #37 in FY2025; down 24 since FY2020.
84	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$104,371	0.1%	Rank history: not on the FY2022 list, #100 in FY2023, #94 in FY2024 and #82 in FY2025; up 264 since FY2020.
85	Middletown Industrial, Inc. Top agencies Army (Department of the Army)	$100,000	0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
86	Cherokee Nation Through Cherokee Nation Red Wing, L.L.C. Top agencies Army (Department of the Army)	$99,950	0.1%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
87	Sogen Company, Inc. Top agencies DLA (Defense Logistics Agency)	$90,731	0.1%	Rank history: #95 in FY2022, not on the FY2023 list, #31 in FY2024 and #52 in FY2025; up 7 since FY2020.
88	Hovers Co.,Ltd. Top agencies USAF (Department of the Air Force)	$90,723	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$87,893	0.1%	Rank history: #45 in FY2022, #28 in FY2023, #24 in FY2024 and #11 in FY2025; new, not ranked in FY2020.
90	Blake & Pendleton, Inc. Top agencies USAF (Department of the Air Force)	$86,658	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Fad Pennsylvania Inc. Top agencies DLA (Defense Logistics Agency)	$84,384	0.1%	Rank history: not on the FY2022–FY2025 lists; up 187 since FY2020.
92	D 'N A Heating & Air LLC Top agencies DHS (Department of Homeland Security)	$83,539	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$83,428	0.1%	Rank history: not on the FY2022–FY2025 lists; up 150 since FY2020.
94	Mainstream Engineering Corp Top agencies DLA (Defense Logistics Agency)	$82,560	0.1%	Rank history: #11 in FY2022, #47 in FY2023, #3 in FY2024 and #6 in FY2025; down 40 since FY2020.
95	C & D Equipment Company, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$79,470	0.1%	Rank history: #81 in FY2022, not on the FY2023–FY2024 lists and #98 in FY2025; up 151 since FY2020.
96	Trevose Industrial Products Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$77,091	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Unimex Corporation Through Paragon Defense Solutions Inc. Top agencies DLA (Defense Logistics Agency)	$74,800	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Chase Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$72,762	0.1%	Rank history: not on the FY2022–FY2024 lists and #85 in FY2025; up 74 since FY2020.
99	Lemoine Marine Refrigeration, Inc. Top agencies DHS (Department of Homeland Security)	$72,056	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Longhorn Regional Service Center, LLC Top agencies DLA (Defense Logistics Agency)	$71,507	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.

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100 of 401 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $112 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC 4130 contractors in FY2021?

1. DCM Clean Air Products, Inc. ($45.4M), 2. Johnson Controls Security Solutions LLC ($11.7M), 3. BBA Aviation PLC ($4.86M), 4. Leonardo S.p.A. ($4.7M), 5. Consolidated Edison ($4.2M), 6. Janels Industries Inc. ($2.29M), 7. Clayton Associates Inc. ($2.23M), 8. Hunter Defense Technolog ($2.23M), 9. Global Logistics & Services W.L.L. ($1.85M), 10. Trane U.S. Inc. ($1.69M).

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